Solution

Correct answer is Option 2

Explanation:The Transport Layer in the Open System Interconnection (OSI) model is responsible for end-to-end delivery over a network.

Transport Layer uses some standard protocols to enhance its functionalities are

• TCP(Transmission Control Protocol),
• UDP( User Datagram Protocol),
• DCCP( Datagram Congestion Control Protocol), etc.

Functions of the transport layer

1. Service-point addressing
2. Segmentation and Reassembly
3. Connection Control
4. Multiplexing and Demultiplexing
5. Flow control Error Control